$\"\"$

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The function is $\"\"$ .

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Differentiate on each side with respect to $\"\"$ .

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$\"\"$

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The function is in the form of composite function $\"\"$ .

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Assume $\"\"$ and $\"\"$ .

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Consider $\"\"$ .

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Product rule of derivatives: $\"\"$ .

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$\"\"$

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Derivative of the secant function: $\"\"$ .

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$\"\"$

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$\"\"$ .

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$\"\"$

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$\"\"$

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Chain Rule of derivatives: $\"\"$ .

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Substitute $\"\"$ and $\"\"$ in chain rule.

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$\"\"$

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$\"\"$ .

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$\"\"$

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$\"\"$ .